This carbon monoxide detector personal alarm notification package with Flash Receiver and Bed Shaker from Bellman & Symfon is designed to keep you and your family safe day and night. The Carbon Monoxide Transmitter detects traces of carbon monoxide early, well before it reaches levels that could be dangerous to you. When activated, the transmitter will immediately send a radio signal wirelessly to the Flash Receiver, and you will be alerted with bright flashing lights and intensive vibrations from the bed shaker which will be sure to wake hard of hearing, deaf or heavy sleepers. The backup batteries on the Flash Receiver can keep it fully functional even during a power outage. This carbon monoxide detector personal alarm notification package will especially help people with hearing loss stay safe and feel protected! This complete package has been certified according to standards UL2034 / CSA 6.19.